<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>登录</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">

  </head>
  <style>

body{background-color: #6ebccb
}

      .a02{
          margin:0 auto;
          padding-top: 150px;
          width: 250px;
          height: 50px;
      }
      .msg{
          color: red;
      }


  </style>
  <body>
  <div class="a02">
  <form method="post">
  <div  class="form-group">
    <label for="exampleInput">账户名：</label>
    <input type="text" class="form-control" id="exampleInput" name="user">
  </div>
  <div class="form-group">
    <label for="exampleInputPassword1">密码：</label>
    <input type="password" class="form-control" id="exampleInputPassword1" name="pwd">
  </div>
  <button type="submit" class="btn btn-primary">登录</button>  <em class="msg">{{msg}}</em>
</form>

      </div>


  </body>
</html>